20道有理数+—混合运算(有答案,不要过程)
2个回答
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1.判断题
(1)3-4×(-3.5)=0
(2)如果a与-2互为倒数,那么a2-2a=1.
(3)-( )2=-
(4)-(-1)3×(-0.2)3=0.008.
(5)0.25×1 +0.75÷ = .
(6)(-4)+(-7)-(-21)=-4-7+21.
(7)|-1.3|+0÷(5.7×|- |+ )=1.3.
(8)(a-2)2+|b-4|=0,则a=2,b=4.
2.填空题
(1)-32×5-(-4)2×2=_________.
(2)(-1)4-5×(- )3=________.
(3)-(-3)2-33=_________.
(4)-32÷(-3)2+(-2)4÷(-24)=_________.
(5)|(-1)7-(-2)3|=__________.
(6)若|a-3|+|b+ |=0,则ba=__________.
(7)用“>”或“<”号连接下列各组数.
①-32____________ (-2)2; ②- ____________-|- |;
③(-1)53____________(-2)37;
(1)3-4×(-3.5)=0
(2)如果a与-2互为倒数,那么a2-2a=1.
(3)-( )2=-
(4)-(-1)3×(-0.2)3=0.008.
(5)0.25×1 +0.75÷ = .
(6)(-4)+(-7)-(-21)=-4-7+21.
(7)|-1.3|+0÷(5.7×|- |+ )=1.3.
(8)(a-2)2+|b-4|=0,则a=2,b=4.
2.填空题
(1)-32×5-(-4)2×2=_________.
(2)(-1)4-5×(- )3=________.
(3)-(-3)2-33=_________.
(4)-32÷(-3)2+(-2)4÷(-24)=_________.
(5)|(-1)7-(-2)3|=__________.
(6)若|a-3|+|b+ |=0,则ba=__________.
(7)用“>”或“<”号连接下列各组数.
①-32____________ (-2)2; ②- ____________-|- |;
③(-1)53____________(-2)37;
参考资料: http://www.heroedu.cn/Article/ArticleShow.asp?ArticleID=121988
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